Amumu top tier?

If not why? I have been wrecking with him as of late. I'm only level 11 but I'm like 30-18 and I started out like 12-14. Then I found amumu+jungle=win.---Steam ID: Brutal_FelixIntel Core i5 3570k 4.4Ghz | ASRock Z77 Extreme4 | Ripjaws X Series 8 GB | Samsung 840 Pro Series 256 GB | Gigabyte Radeon HD 7970

Jungling anything pre-20 (or so) is generally thought of as hurting the team. You can't stay in the jungle as long as someone who has the runes/masteries to support it better.---""You miss 100% of the shots you dont take. -Wayne Gretzky" -Michael Scott." -SirGizmo